add is_composite_type from definitions.js
add is_composite_type from definitions.js

Reviewed By: ginfung

Differential Revision: D26024020

fbshipit-source-id: a6af7b6153e64d2211bd51673e7e547a92373b27

wincent/relay,voideanvalue/relay,voideanvalue/relay,josephsavona/relay,xuorig/relay,josephsavona/relay,wincent/relay,facebook/relay,wincent/relay,atxwebs/relay,xuorig/relay,wincent/relay,voideanvalue/relay,atxwebs/relay,kassens/relay,yungsters/relay,facebook/relay,voideanvalue/relay,wincent/relay,xuorig/relay,kassens/relay,facebook/relay,facebook/relay,facebook/relay,kassens/relay,facebook/relay,josephsavona/relay,atxwebs/relay,xuorig/relay,wincent/relay,yungsters/relay,atxwebs/relay,xuorig/relay,voideanvalue/relay,yungsters/relay,kassens/relay,xuorig/relay,kassens/relay,voideanvalue/relay,kassens/relay